I know what you guys are thinking. Yes I did read the 160 thread at the top(few pages anyway) I have a month old walk behind honda mower from home depot(self propelled,dual blades). I decided to not cheap out this time and get something that would last a take the abuse. I own a non self propelled honda professional series It was bought new in 97 and lets say its be very well used doesnt burn any oil so this is what made me want to buy a new one for our house. Yesterday I accidentally hit a metal post which shut the mower down. I figured ok it prob broke the key thats what its supposed to do to prevent the shaft from bending. I found out that the mower started back up and vibrated really bad so im guessing the shaft is bent. Ill check that today when I get the time. Now my main reason of this post doesnt these motors have a key that should sheer when this happens? Ive hit rocks,posts and so on with cheap mowers and they all sheered the key.